add personality() system call.

Change-Id: Ie899def8ea1d705930ed83adae1343c1353e7c57
diff --git a/libc/SYSCALLS.TXT b/libc/SYSCALLS.TXT
index 46e7b1f..d72d129 100644
--- a/libc/SYSCALLS.TXT
+++ b/libc/SYSCALLS.TXT
@@ -251,6 +251,7 @@
 int     delete_module(const char*, unsigned int)   129
 int     klogctl:syslog(int, char *, int)   103
 int     sysinfo(struct sysinfo *)  116
+int     personality(unsigned long)  136
 
 # futex
 int	futex(void *, int, int, void *, void *, int) 240